Joint Annual Meeting of the Swiss and Austrian Physical Society 2023

【226】Surface band-bending response to charge redistribution and adsorbates in the ZnO/electrolyte interface probed by in-situ Spectroscopic Ellipsometry

7 Sept 2023, 18:15

15m

Room 114

Talk Surfaces, Interfaces and Thin Films Surfaces, Interfaces and Thin Films

Speaker

Luis Rosillo

Description

In this work we look at the response of the surface band-bending of the ZnO single crystal polar faces (0001) and (000-1), in contact with an electrolyte, to a variation of charge at the solid-liquid interface by analyzing the effect of the inner electric fields on the excitonic dielectric function using in-situ spectroscopic ellipsometry.
Discrete excitons on ZnO have a binding energy of (~60meV) and in space charge region are significantly sensitive to modifications in the surface dipole moment. Hence, making them a siutable probe to study the response of the band-bending.